Sorry you're going through such a tough time. It's difficult to deal with si alone, let alone when an alter tries to take over. Are you able to communicate with your alters? It would be super helpful if you could figure out why they are feeling the need to at the moment.

Another suggestion is figuring out what your triggers are for si. Some people do it to feel something, because they feel so numb, some people do it to calm down emotions that are getting out of control, to take them away from what is going on in their head. Others because they are angry and the anger gets turned on themselves, etc etc. If you can figure out what your triggers are, or reasons for doing it, you could try and come up with some solutions. Has anything changed lately that might have caused emotions? I find when something happens that upsets one of my alters, and I don't deal with the issue, they get worse. For example my 6 year old had a horrible week this week because my mom was away on a trip. At first I just ignored it, thought it was silly, I don't live at home and it didn't affect my daily life. However, she was so upset I ended up having to deal with those emotions, so that she would be calmer. Sometimes things bother us, but we push it down and then an alter gets really upset about it.

One of my biggest reasons for wanting to si is when I feel like no one is listening to me. It goes back to when I would try to tell people somethign was wrong growing up, and no one clued in that I was being abused. So I need to realize that if I'm getting upset because no one is listening, I need to call someone and MAKE them listen, even if it's my t, or a crisis line. Then I dont' feel the need to take it out on myself.

There are lots of things you can do to help get rid of emotions, something physical for anger or anxiety, somethign soothing for panic/fear/anxiety, and something sensory if you're feeling numb. It can alleviate the urges.

I don't know what would help for you, so hopefully something in here was a bit of a help. If you feel comfortable sharing more information I could try and support with more of that. Of course, this goes without saying, if you do not feel safe, make sure someone is with you/knows about it, or that you call someone for help.

Hope this helps
xoxoxo

IJ